if you can develop a good sense of balance without poles. i.e. minimal arm movement, your skiing in general will improve. Your sense of balance is on a whole different level at a few sessions of not using poles. The list of pros who practice with no poles is pretty long. Pollard, Mahre, Mik D, etc. I personally find skiing with no poles to be pretty ugly. But if it is for practice so that when you pic up your poles again, your fakie cork 5 is flawless, or your airsense when you drop your next cliff is perfect well then its for the better. no-poles is like braces, they look horrible for the short time that you wear them, but when they come off you got a damn good set of pearly whites.